* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background-color: #f4f6f8;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.navbar {
  background: #fff;
  border-bottom: 1px solid #dfe3e8;
  padding: 12px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 26px;
  font-weight: bold;
  color: #2c3e50;
  text-decoration: none;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: #454f5b;
  font-weight: 600;
  font-size: 14px;
}

.search-box {
  display: flex;
}

.search-box input {
  padding: 6px 10px;
  border: 1px solid #c4cdd5;
  border-radius: 4px 0 0 4px;
}

.search-box button {
  padding: 6px 12px;
  background: #27ae60;
  color: white;
  border: none;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
}

.page-layout {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-top: 20px;
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
}

.content {
  flex-grow: 1;
}

.info-block {
  background: #fff;
  padding: 15px;
  margin-bottom: 15px;
  border-radius: 4px;
  border-left: 5px solid #3498db;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.info-block.buy {
  border-color: #27ae60;
}
.info-block h3 {
  margin: 0 0 8px 0;
  font-size: 16px;
}
.info-block p {
  font-size: 13px;
  margin: 0 0 8px 0;
  color: #637381;
}
.info-block ul {
  padding-left: 15px;
  font-size: 12px;
  margin: 0;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.product-card {
  background: #fff;
  border: 1px solid #dfe3e8;
  padding: 12px;
  text-align: center;
  text-decoration: none;
  color: inherit;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-card:hover {
  border-color: #27ae60;
}

.img-container {
  width: 100%;
  height: 140px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.product-card h4 {
  margin: 0 0 5px 0;
  font-size: 14px;
  height: 36px;
  overflow: hidden;
}

.price {
  color: #bf0711;
  font-weight: bold;
  font-size: 16px;
  margin-top: auto;
}

.seo-content-section {
  margin-top: 50px;
  padding: 50px 0;
  background-color: #fff;
  border-top: 2px solid #27ae60;
}

.seo-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.seo-header h2 {
  font-size: 32px;
  color: #212b36;
  margin-bottom: 15px;
}

.seo-header .lead {
  font-size: 18px;
  color: #637381;
}

.seo-grid {
  display: flex;
  gap: 30px;
  margin-bottom: 40px;
  margin-right: 20px;
  margin-left: 20px;
}

.seo-column {
  flex: 1;
}

.seo-card {
  background: #f9fafb;
  padding: 25px;
  border-radius: 12px;
  margin-bottom: 30px;
  border: 1px solid #eee;
}

.seo-card.highlight {
  background: #eef9f1;
  border-color: #d1e7dd;
}

.seo-card h3 {
  font-size: 20px;
  color: #27ae60;
  margin-top: 0;
  margin-bottom: 15px;
}

.seo-card p {
  font-size: 15px;
  line-height: 1.7;
  color: #454f5b;
  margin-bottom: 15px;
}

.seo-full-text {
  max-width: 1000px;
  margin: 40px auto;
  padding: 30px;
  border-left: 4px solid #3498db;
  background: #fff;
}

.seo-full-text h3 {
  margin-top: 0;
  font-size: 22px;
}

.seo-footer-note {
  background: #212b36;
  color: #fff;
  padding: 30px;
  border-radius: 8px;
  text-align: center;
  font-size: 16px;
}

.footer {
  background: #111;
  color: #fff;
  padding: 40px 0;
}

.footer-cols {
  display: flex;
  justify-content: space-between;
}
.footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer a {
  color: #ccc;
  text-decoration: none;
  font-size: 13px;
}
.footer a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid #333;
  margin-top: 30px;
  padding-top: 20px;
  text-align: center;
}

.seo-content-section {
  margin-top: 50px;
  padding: 50px 0;
  background-color: #fff;
  border-top: 2px solid #27ae60;
}

.seo-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.seo-header h2,
.seo-header h1 {
  font-size: 32px;
  color: #212b36;
  margin-bottom: 15px;
}

.seo-header .lead {
  font-size: 18px;
  color: #637381;
  line-height: 1.6;
}

.seo-grid {
  display: flex;
  gap: 30px;
  margin-bottom: 40px;
  padding: 0 20px;
}

.seo-column {
  flex: 1;
}

.seo-card {
  background: #f9fafb;
  padding: 25px;
  border-radius: 12px;
  margin-bottom: 30px;
  border: 1px solid #eee;
}

.seo-card.highlight {
  background: #eef9f1;
  border-color: #d1e7dd;
}

.seo-card h3 {
  font-size: 20px;
  color: #27ae60;
  margin-top: 0;
  margin-bottom: 15px;
}

.seo-card p {
  font-size: 15px;
  line-height: 1.7;
  color: #454f5b;
  margin-bottom: 15px;
}

.seo-full-text {
  max-width: 1000px;
  margin: 40px auto;
  padding: 30px;
  border-left: 4px solid #3498db;
  background: #fff;
}

.seo-full-text h3 {
  margin-top: 0;
  font-size: 22px;
  color: #2c3e50;
  margin-bottom: 15px;
}

.seo-full-text p {
  line-height: 1.8;
  color: #454f5b;
  margin-bottom: 15px;
}

.seo-footer-note {
  background: #212b36;
  color: #fff;
  padding: 30px;
  border-radius: 8px;
  text-align: center;
  font-size: 16px;
  margin: 0 20px;
}

@media (max-width: 992px) {
  .seo-grid {
    flex-direction: column;
  }
  .seo-header h2,
  .seo-header h1 {
    font-size: 26px;
  }
  .page-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
  }
  .seo-grid {
    flex-direction: column;
  }
}